US4010300A - Heat welded joints between webs of reinforced plastic foil - Google Patents

Heat welded joints between webs of reinforced plastic foil Download PDF

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Publication number
US4010300A
US4010300A US05/430,406 US43040674A US4010300A US 4010300 A US4010300 A US 4010300A US 43040674 A US43040674 A US 43040674A US 4010300 A US4010300 A US 4010300A
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United States
Prior art keywords
webs
cover
heat welded
set forth
length
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US05/430,406
Inventor
Erik Wilhelm Wallin
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Barracudaverken AB
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Barracudaverken AB
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F13/00—Coverings or linings, e.g. for walls or ceilings
    • E04F13/002—Coverings or linings, e.g. for walls or ceilings made of webs, e.g. of fabrics, or wallpaper, used as coverings or linings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
    • B29C65/62—Stitching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/72—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by combined operations or combined techniques, e.g. welding and stitching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/133—Fin-type joints, the parts to be joined being flexible
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/21—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/435—Making large sheets by joining smaller ones or strips together
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/721—Fibre-reinforced materials
    • B29C66/7212—Fibre-reinforced materials characterised by the composition of the fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/19—Sheets or webs edge spliced or joined
    • Y10T428/192—Sheets or webs coplanar
    • Y10T428/197—Sheets or webs coplanar with noncoplanar reinforcement
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24008—Structurally defined web or sheet [e.g., overall dimension, etc.] including fastener for attaching to external surface
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24033—Structurally defined web or sheet [e.g., overall dimension, etc.] including stitching and discrete fastener[s], coating or bond
    • Y10T428/24041—Discontinuous or differential coating, impregnation, or bond
    • Y10T428/2405—Coating, impregnation, or bond in stitching zone only
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/2419—Fold at edge

Abstract

The invention refers to heat weld joints of the type used for adjoining webs of reinforced plastic foil intended for use as stretched ceiling covers. The invention consists in the provision of means at intervals along the heat weld joints for reinforcing same to withstand the influence of heat. The invention also covers a process for the preparation of such reinforced heat weld joints.

Description

The present invention refers to improvements in heat weld joints between webs of reinforced plastic foil intended for use as stretched ceiling covers. The invention also refers to a process for providing such joints.
In recent years ceiling cover structures of plastic foil have reached a progressively increased use. The advantage of such plastic foil ceiling cover is mainly that it obviates time-consuming and expensive polishing of coarse concrete surfaces of cast concrete vaults according to previously used technique. However, it has been found that hitherto known ceiling cover structures made from reinforced plastic foil by joining several parallel webs by means of heat welding are subject to certain disadvantages. In case of fire, resulting in heating of the ceiling cover, it has namely been found that if the temperature increases to much too high values, the heat weld joints between the plastic foil webs may break so that the webs will depend from the ceiling to a significant extent. This may in turn result in panicking in connection with evacuation of the building wherein fire has arisen. The inconvenience is particularly pronounced when using such reinforced plastic foil wherein the reinforcement consists of a material subject to heat shrinkage. When a ceiling cover structure based on such plastic foil is subjected to heating this results in stresses in the heat weld joints, whereby said joints break to an essential extent resulting in the inconveniences indicated above.
In connection with the present invention it has now been found that the above disadvantages can be eliminated by an arrangement consisting in means provided at intervals along the heat weld joints for reinforcing the joint by mechanical binding of the reinforcement material. Such reinforcing means, which are preferably arranged at essentially equal intervals, can consist of a stitching or a thread seam made with heat resistant thread or of any form of rivets or clips. It is particularly advantageous to arrange the reinforcing means in adjacent joints displaced or staggered, i.e. in zigzag, whereby the points or areas of reinforcement are subjected to the lowest possible stress. This is particularly desirable when using such reinforced plastic foils, wherein the reinforcement consists of a material subject to heat shrinkage. It is particularly preferred to use reinforcing means consisting in a stitching or a thread seam, and in this connection it has been found to be particularly suitable to use a thread seam extending in the longitudinal direction of the heat weld joint and covering about one fourth of the length of the joint.
The invention also refers to a process for providing the reinforcement arrangement, and this process consists in arranging reinforcing means along the heat weld joint at essentially equally spaced intervals.
In the following the invention will be described by example of a particularly preferred embodiment in connection with the appended drawing. It should, however, be observed that the invention in no way shall be construed as delimited to the embodiment shown. In the drawing,
FIG. 1 shows in a plan view from above a ceiling cover in accordance with the invention, whereas
FIG. 2 shows an enlarged section taken along the line II--II in FIG. 1.
FIG. 1 of the drawing thus shows in a plan view seen from above a ceiling cover consisting of a reinforced plastic foil stretched between four walls. In the embodiment shown in FIG. 1 the ceiling cover structure consists of six parallel webs 3 of such reinforced plastic foil, the webs being joined by heat welding in five heat weld joints 5 in a conventional manner. As is clear from the detail section in FIG. 2 the webs 3 are joined in connection to upwardly bent edge parts 9, 11, which have been pressed together while heating to the formation of a zone 13 of molten plastics, by means of which the edge parts 9, 11 are held together. The ceiling cover may be stretched in a frame of track ribs attached to the walls, for instance in conformity with the technique described in the Swedish Pat. spec. No. 323,189 (which is incorporated herein by reference). However, the way of stretching and attachment of no part of the present invention and it may be carried out in any suitable manner.
The heat weld joints 5 holding webs 3 of plastic foil together are, in accordance with the present invention, supplemented with reinforcing means 7, said means in the embodiment shown consisting of thread stitchings positioned in the longitudinal direction of the heat weld joints 5 and at spaced regular intervals along said joints. As is clear from the plan view of FIG. 1 the places of reinforcement are positioned displaced or in zigzag, i.e. mutually displaced in the heat weld joints 5 in such a manner that each thread stitching 7 of one heat weld joint is positioned about equally spaced between the thread stitchings 7 of the adjacent heat weld joint.
As introductorily stated, in case of fire, problems may arise in connection with using a ceiling cover in the form of stretched reinforced plastic foil. Particularly when using a reinforcement material subject to heat shrinkage great stresses will be created in the ceiling cover in case of fire, which results in breaking of the heat weld joints, whereby the plastic foil webs wholly or partly are disengaged and will depend from the ceiling in large pieces. By the arrangement according to the present invention consisting in the provision of reinforcements along the heat weld joints this inconvenience is avoided. By the arrangement shown in FIG. 1 of the drawing consisting in displacement of the reinforcing areas a maximum of relief of the stresses is provided in the cases where the reinforcement consists of a material subject to heat shrinkage.
The reinforced plastic foil may advantageously consist of plasticized polyvinyl chloride foil reinforced with a structural fabric of polyamide fibers. The preferred embodiment as regards the reinforcing means consisting in thread stitchings may advantageously be provided by means of a thread consisting of polyamide fiber. At a web width of about 150 cm it has been found to be particularly suitable to use a stitching length of about 20 cm and a distance between the places of stitching of about 80 cm. Quite generally, the distance between the places of reinforcement should lie within the range of about 0.3 - 0.8 times the web width.
The invention is not delimited to the embodiment described above. Thus, the reinforcing means may consist of other elements, such as plastic or metal rivets, metal clips and the like. Neither is the invention delimited to the use of such reinforced plastic foil consisting of polyvinyl chloride reinforced with polyamide fibers. Thus, the polyvinyl chloride may be replaced by any polyvinyl polymer, olefin polymer or urethane elastomer. As concerns the reinforcing material the only requirement, in addition to the heat resistance, is that in the form it is present in the plastics it shall possess a certain elasticity, i.e. a yielding characteristic, making it suitable for stretching to form a ceiling cover. The reinforcing material may consist of synthetic fibers, for instance based on polyamides or polyesters, or mixed fibers based on synthetic fibers together with other fibers in a minor amount, for instance cotton. It is also conceivable to make the reinforcing material from glass fibers.

Claims (8)

What is claimed is:
1. A cover comprising at least two elongated webs of reinforced plastic foils for use as a stretched ceiling cover with each web having edges extending in the elongated direction of the web and with the surfaces of said webs disposed in generally planar relationship and the elongated edges of said webs disposed in parallel relation, wherein the improvement comprises that the elongated edges of said webs being bent out of the plane of said webs and extending angularly outwardly from the plane of said webs, adjacent said elongated edges on adjacent webs being disposed in contacting relationship and heat welded together along their lengths forming a heat welded joint therebetween, means extending through the outwardly bent portions of said elongated edges of said webs forming the heat welded joint for securing the outwardly bent portions together, and said means positioned at spaced intervals along the length of the joint for reinforcing the joint.
2. A cover, as set forth in claim 1, wherein the reinforcing means being arranged at equally spaced intervals along the length of the heat welded joint.
3. A cover, as set forth in claim 1, wherein the cover comprises at least three said elongated webs of reinforced plastic foils, and said reinforcing means in adjacent heat welded joints being staggered relative to one another in the length direction of said joints.
4. A cover, as set forth in claim 1, wherein said reinforced plastic foils include a reinforcing structure fabric of polyamide fibers subject to heat shrinkage.
5. A cover, as set forth in claim 3, wherein the spaced interval between adjacent reinforcing means along the length of said heat welded joints is 0.3-0.8 times the dimension of the web extending transversely of the length of the heat welded joint.
6. A cover, as set forth in claim 3, wherein said reinforcing means consists of a thread stitched through the portions of adjacent elongated edges of said webs forming the heat welded joint.
7. A cover, as set forth in claim 6, wherein the spaced intervals of said stitched thread reinforcing means extending along the length of said heat welded joint occupies about one-fourth of the length of the joint.
8. A cover, as set forth in claim 6, wherein said reinforcing means extending through said heat welded joint are located intermediate the planar surfaces and the elongated edges of said webs.
US05/430,406 1973-01-03 1974-01-03 Heat welded joints between webs of reinforced plastic foil Expired - Lifetime US4010300A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SW7300082 1973-01-03
SE7300082A SE387691B (en) 1973-01-03 1973-01-03 DEVICE FOR HEATING WELDING JOINT BETWEEN WADERS OF REINFORCED PLASTIC FOILS AND PROCEDURE FOR ITS

Publications (1)

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US4010300A true US4010300A (en) 1977-03-01

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US05/430,406 Expired - Lifetime US4010300A (en) 1973-01-03 1974-01-03 Heat welded joints between webs of reinforced plastic foil

Country Status (8)

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US (1) US4010300A (en)
JP (1) JPS4999677A (en)
BE (1) BE809368A (en)
DE (1) DE2364864A1 (en)
FR (1) FR2212223A1 (en)
IT (1) IT1000398B (en)
NL (1) NL7317728A (en)
SE (1) SE387691B (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4109435A (en) * 1977-08-26 1978-08-29 Rockwell International Corporation Composite structural joint and method of fabrication thereof
US4137687A (en) * 1977-06-28 1979-02-06 Sprung Philip D Stressed membrane space enclosure
US4151692A (en) * 1977-07-15 1979-05-01 Emerson H. Mizell T-Shaped insulation with vapor barrier
US4190010A (en) * 1977-03-18 1980-02-26 Noel Bibby Limited Waterproof inwardly facing garment seams produced by high frequency welding
FR2438715A1 (en) * 1978-10-09 1980-05-09 Sprung Philip Building stressed membrane enclosing structure - by power jack tensioning fabric strips on transverse arch frames with slide pads
US4219980A (en) * 1977-08-26 1980-09-02 Rockwell International Corporation Reinforced composite structure and method of fabrication thereof
US4256790A (en) * 1978-01-19 1981-03-17 Rockwell International Corporation Reinforced composite structure and method of fabrication thereof
US4297156A (en) * 1978-02-24 1981-10-27 Dalle & Cie, S.A. Process for manufacture of wall coverings and wall coverings thus obtained
US4330580A (en) * 1978-02-24 1982-05-18 Dalle & Cie, S.A. Process for manufacture of wall coverings and wall coverings thus obtained
US4478661A (en) * 1981-03-20 1984-10-23 Dayco Corporation Method of making a reinforced collapsible hose construction

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1560712A (en) * 1921-07-21 1925-11-10 Gem Shirt Company Seam for garments
US2031098A (en) * 1933-12-11 1936-02-18 Sam P Cerf Device for protecting concrete
US2115368A (en) * 1935-08-03 1938-04-26 Lustberg Benjamin Herbert Seam
US2624886A (en) * 1948-11-12 1953-01-13 J W Johnson Company Seam for tarpaulin or other waterproof fabric
US2683679A (en) * 1950-10-07 1954-07-13 Twentieth Cent Fox Film Corp Jointed sheet material and methods of forming same
US2974566A (en) * 1957-11-15 1961-03-14 Hurley Screen Company Inc Multi-section motion picture projection screen
US3199481A (en) * 1961-12-18 1965-08-10 Midwest Canvas Corp Insulating article
US3420731A (en) * 1964-06-30 1969-01-07 Deering Milliken Res Corp Heat sealable yarn and fabric
US3424161A (en) * 1966-02-25 1969-01-28 Kendall & Co Sewn diaper with non-raveling stitching
US3441467A (en) * 1964-07-28 1969-04-29 Prime Mfg Co Rib stripping
US3459149A (en) * 1967-09-05 1969-08-05 Ronald J Hallmark Prefabricated sail kit
US3615966A (en) * 1967-10-27 1971-10-26 Sven Olof Birger Ljungbo Method of forming a ceiling cover structure of swellable plastic sheeting

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1560712A (en) * 1921-07-21 1925-11-10 Gem Shirt Company Seam for garments
US2031098A (en) * 1933-12-11 1936-02-18 Sam P Cerf Device for protecting concrete
US2115368A (en) * 1935-08-03 1938-04-26 Lustberg Benjamin Herbert Seam
US2624886A (en) * 1948-11-12 1953-01-13 J W Johnson Company Seam for tarpaulin or other waterproof fabric
US2683679A (en) * 1950-10-07 1954-07-13 Twentieth Cent Fox Film Corp Jointed sheet material and methods of forming same
US2974566A (en) * 1957-11-15 1961-03-14 Hurley Screen Company Inc Multi-section motion picture projection screen
US3199481A (en) * 1961-12-18 1965-08-10 Midwest Canvas Corp Insulating article
US3420731A (en) * 1964-06-30 1969-01-07 Deering Milliken Res Corp Heat sealable yarn and fabric
US3441467A (en) * 1964-07-28 1969-04-29 Prime Mfg Co Rib stripping
US3424161A (en) * 1966-02-25 1969-01-28 Kendall & Co Sewn diaper with non-raveling stitching
US3459149A (en) * 1967-09-05 1969-08-05 Ronald J Hallmark Prefabricated sail kit
US3615966A (en) * 1967-10-27 1971-10-26 Sven Olof Birger Ljungbo Method of forming a ceiling cover structure of swellable plastic sheeting

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4190010A (en) * 1977-03-18 1980-02-26 Noel Bibby Limited Waterproof inwardly facing garment seams produced by high frequency welding
US4137687A (en) * 1977-06-28 1979-02-06 Sprung Philip D Stressed membrane space enclosure
US4151692A (en) * 1977-07-15 1979-05-01 Emerson H. Mizell T-Shaped insulation with vapor barrier
US4109435A (en) * 1977-08-26 1978-08-29 Rockwell International Corporation Composite structural joint and method of fabrication thereof
US4219980A (en) * 1977-08-26 1980-09-02 Rockwell International Corporation Reinforced composite structure and method of fabrication thereof
US4256790A (en) * 1978-01-19 1981-03-17 Rockwell International Corporation Reinforced composite structure and method of fabrication thereof
US4297156A (en) * 1978-02-24 1981-10-27 Dalle & Cie, S.A. Process for manufacture of wall coverings and wall coverings thus obtained
US4330580A (en) * 1978-02-24 1982-05-18 Dalle & Cie, S.A. Process for manufacture of wall coverings and wall coverings thus obtained
FR2438715A1 (en) * 1978-10-09 1980-05-09 Sprung Philip Building stressed membrane enclosing structure - by power jack tensioning fabric strips on transverse arch frames with slide pads
US4478661A (en) * 1981-03-20 1984-10-23 Dayco Corporation Method of making a reinforced collapsible hose construction

Also Published As

Publication number Publication date
IT1000398B (en) 1976-03-30
JPS4999677A (en) 1974-09-20
BE809368A (en) 1974-05-02
NL7317728A (en) 1974-07-05
DE2364864A1 (en) 1974-07-18
FR2212223A1 (en) 1974-07-26
SE387691B (en) 1976-09-13

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